/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.audaque.springboot.foshanupload.web.rocketmqdemo.stream.controller;

import lombok.extern.slf4j.Slf4j;
import org.apache.rocketmq.client.apis.ClientException;
import org.apache.rocketmq.common.MixAll;
import org.apache.rocketmq.streams.core.RocketMQStream;
import org.apache.rocketmq.streams.core.rstream.StreamBuilder;
import org.apache.rocketmq.streams.core.window.Time;
import org.apache.rocketmq.streams.core.window.WindowBuilder;
import org.apache.rocketmq.streams.core.topology.TopologyBuilder;
import org.apache.rocketmq.streams.core.util.Pair;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Properties;

@Slf4j
@RestController
@RequestMapping("slideWindowCount")
public class SlideWindowCountController {

    @Value("${rocketmqNameServerHost}")
    private String rocketmqNameServerHost;

    @Value("${rocketmqNameServerPort}")
    private String rocketmqNameServerPort;



    @GetMapping("toRStream")
    public void toRStream(
            @RequestParam("sourceTopic") String sourceTopic, // 消息发送的目标Topic名称，需要提前创建。
            @RequestParam("jobId") String jobId
    ) throws ClientException, IOException {
        StreamBuilder builder = new StreamBuilder(jobId);
        builder.source(sourceTopic, source -> {
                    String value = new String(source, StandardCharsets.UTF_8);
                    int result = Integer.parseInt(value);
                    return new Pair<>(null, result);
                })
                .filter(value -> value > 0)
                //写死
                .keyBy(value -> "key")
                //滑动窗口:20-10=10，即10秒输出一次
                .window(WindowBuilder.slidingWindow(Time.seconds(20), Time.seconds(10)))
                .count()
                .toRStream()
                .print();

        TopologyBuilder topologyBuilder = builder.build();

        Properties properties = new Properties();
        properties.putIfAbsent(MixAll.NAMESRV_ADDR_PROPERTY, rocketmqNameServerHost.concat(":").concat(rocketmqNameServerPort));

        RocketMQStream rocketMQStream = new RocketMQStream(topologyBuilder, properties);
        Runtime.getRuntime().addShutdownHook(new Thread("wordcount-shutdown-hook") {
            @Override
            public void run() {
                rocketMQStream.stop();
            }
        });

        rocketMQStream.start();
    }

}
